diff --git a/src/install-dhall.sh b/src/install-dhall.sh
index a45dddb..e9d7a79 100755
--- a/src/install-dhall.sh
+++ b/src/install-dhall.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -eu
+
 echo "Downloading dhall from: $1"
 wget --quiet $1